Andreas Josef Dax

Andreas Josef Dax is a researcher at the Paul Scherrer Institute (PSI), affiliated with the Center for Photon Science and Laboratory for Non-linear Optics. He specializes in laser spectroscopy, quantum electrodynamics, and particle physics, contributing to projects like the SwissFel free-electron laser.

• Education: Diploma and PhD in Physics from Bonn University

His research focuses on experimental investigations of fundamental particles and interactions, including the pion-helium system, proton radius discrepancies, and antiprotonic helium studies to test matter-antimatter symmetry. He also works on technical developments for ultra-stable laser systems in electron beam manipulation.

Key article trends include precision measurements in exotic atoms, strong-field QED tests, and nuclear structure studies using laser spectroscopy. Publications span high-impact journals like Nature, Nature Communications, and Physical Review A.

• Institutional Roles: Member of SwissFel gun laser group, HERO group
• Technical Responsibilities: 24/7 laser system operations, Echo-Enabled Harmonic Generation preparation

His work has driven breakthroughs in resolving the proton radius puzzle and developing laser-based tools for extreme-field QED studies.